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Muñoz Vilchez, Jherson Luis - One of the best experts on this subject based on the ideXlab platform.
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Propuesta para uso de fibras de queratina como refuerzo para resina poliéster (Tesis Parcial)
'Dipartimento di Economia Universita di Perugia (IT)', 2018Co-Authors: Muñoz Vilchez, Jherson LuisAbstract:ABSTRACT The present work is entitled "Proposal for the use of Keratin Fibers as reinforcement for polyester resin", in which it is the use of giving use to the discarded hair of the different aesthetic centers of the city of Cajamarca, reusing these debris as a reinforcement in a polyester matrix composite, 5, 10, 15 and 20% random short Fiber weight percentages, molded by the hand lay-up process, were used for the preparation of these compounds. Mechanical tests were also carried out in order to evaluate the influence of the weight percentage of Keratin Fiber in the compound on its tensile and flexural strength values according to ASTM D-63801 and ASTM D 790-03 respectively with a total of 15 samples per test. From the results obtained it was found that the tensile and flexural strength increases with respect to the increase in the weight percentage of Fiber, in tensile the maximum average value is 112.44 MPa with 20% by weight of Fiber and a minimum value of 45.02 MPa to 5% by weight Fiber, this represents 147.76% less than the maximum value. And the maximum flexural strength was 102.01 MPa and a minimum of 61.09 MPa, for compounds reinforced with 20% and 5% by weight Fiber respectively. Keywords: Keratin, traction, flexion, compositeTesisEl presente trabajo lleva como título “Propuesta para uso de fibras de queratina como refuerzo para resina poliéster”, en el cual se pretende dar uso a los cabellos desechados de los diferentes centros de estética de la ciudad de Cajamarca, reutilizando estos desechos como refuerzo en un compuesto de matriz poliéster, para la elaboración de estos compuestos se usaron porcentajes en peso de fibra corta al azar de 5, 10, 15 y 20%, moldeados por el proceso hand lay-up. Así mismo se realizaron pruebas de ensayos mecánicos con la finalidad de evaluar la influencia del porcentaje en peso de fibra de queratina en el compuesto sobre sus valores de resistencia a tracción y flexión bajo normas ASTM D-638-01 y ASTM D 790 – 03 respectivamente con un total de 15 muestras por cada ensayo. De los resultados obtenidos se halló que la resistencia a tracción y flexión se incrementa con respecto al incremento del porcentaje en peso de fibra, en tracción el valor promedio máximo es 112.44 MPa con un 20% en peso de fibra y un valor mínimo de 45.02 MPa al 5% en peso de fibra, esto representa un 147.76% menor respecto al valor máximo. Y la resistencia a la flexión máxima fue 102.01 MPa y mínima de 61.09 MPa, para compuestos reforzados con 20% y 5% en peso de fibra respectivamente. Palabas clave Queratina, tracción, flexión, compuest
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Propuesta para uso de fibras de queratina como refuerzo para resina poliéster (Tesis Parcial)
Universidad Privada del Norte, 2018Co-Authors: Muñoz Vilchez, Jherson LuisAbstract:El presente trabajo lleva como título “Propuesta para uso de fibras de queratina como refuerzo para resina poliéster”, en el cual se pretende dar uso a los cabellos desechados de los diferentes centros de estética de la ciudad de Cajamarca, reutilizando estos desechos como refuerzo en un compuesto de matriz poliéster, para la elaboración de estos compuestos se usaron porcentajes en peso de fibra corta al azar de 5, 10, 15 y 20%, moldeados por el proceso hand lay-up. Así mismo se realizaron pruebas de ensayos mecánicos con la finalidad de evaluar la influencia del porcentaje en peso de fibra de queratina en el compuesto sobre sus valores de resistencia a tracción y flexión bajo normas ASTM D-638-01 y ASTM D 790 – 03 respectivamente con un total de 15 muestras por cada ensayo. De los resultados obtenidos se halló que la resistencia a tracción y flexión se incrementa con respecto al incremento del porcentaje en peso de fibra, en tracción el valor promedio máximo es 112.44 MPa con un 20% en peso de fibra y un valor mínimo de 45.02 MPa al 5% en peso de fibra, esto representa un 147.76% menor respecto al valor máximo. Y la resistencia a la flexión máxima fue 102.01 MPa y mínima de 61.09 MPa, para compuestos reforzados con 20% y 5% en peso de fibra respectivamente. Palabas clave Queratina, tracción, flexión, compuestoABSTRACT The present work is entitled "Proposal for the use of Keratin Fibers as reinforcement for polyester resin", in which it is the use of giving use to the discarded hair of the different aesthetic centers of the city of Cajamarca, reusing these debris as a reinforcement in a polyester matrix composite, 5, 10, 15 and 20% random short Fiber weight percentages, molded by the hand lay-up process, were used for the preparation of these compounds. Mechanical tests were also carried out in order to evaluate the influence of the weight percentage of Keratin Fiber in the compound on its tensile and flexural strength values according to ASTM D-63801 and ASTM D 790-03 respectively with a total of 15 samples per test. From the results obtained it was found that the tensile and flexural strength increases with respect to the increase in the weight percentage of Fiber, in tensile the maximum average value is 112.44 MPa with 20% by weight of Fiber and a minimum value of 45.02 MPa to 5% by weight Fiber, this represents 147.76% less than the maximum value. And the maximum flexural strength was 102.01 MPa and a minimum of 61.09 MPa, for compounds reinforced with 20% and 5% by weight Fiber respectively. Keywords: Keratin, traction, flexion, composit
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Propuesta para uso de fibras de queratina como refuerzo para resina poliéster
Universidad Privada del Norte, 2018Co-Authors: Muñoz Vilchez, Jherson LuisAbstract:RESUMEN El presente trabajo lleva como título “Propuesta para uso de fibras de queratina como refuerzo para resina poliéster”, en el cual se pretende dar uso a los cabellos desechados de los diferentes centros de estética de la ciudad de Cajamarca, reutilizando estos desechos como refuerzo en un compuesto de matriz poliéster, para la elaboración de estos compuestos se usaron porcentajes en peso de fibra corta al azar de 5, 10, 15 y 20%, moldeados por el proceso hand lay-up. Así mismo se realizaron pruebas de ensayos mecánicos con la finalidad de evaluar la influencia del porcentaje en peso de fibra de queratina en el compuesto sobre sus valores de resistencia a tracción y flexión bajo normas ASTM D-638-01 y ASTM D 790 – 03 respectivamente con un total de 15 muestras por cada ensayo. De los resultados obtenidos se halló que la resistencia a tracción y flexión se incrementa con respecto al incremento del porcentaje en peso de fibra, en tracción el valor promedio máximo es 112.44 MPa con un 20% en peso de fibra y un valor mínimo de 45.02 MPa al 5% en peso de fibra, esto representa un 147.76% menor respecto al valor máximo. Y la resistencia a la flexión máxima fue 102.01 MPa y mínima de 61.09 MPa, para compuestos reforzados con 20% y 5% en peso de fibra respectivamente. PALABRAS CLAVES: Queratina, tracción, flexión, compuesto.ABSTRACT The present work is entitled "Proposal for the use of Keratin Fibers as reinforcement for polyester resin", in which it is the use of giving use to the discarded hair of the different aesthetic centers of the city of Cajamarca, reusing these debris as a reinforcement in a polyester matrix composite, 5, 10, 15 and 20% random short Fiber weight percentages, molded by the hand lay-up process, were used for the preparation of these compounds. Mechanical tests were also carried out in order to evaluate the influence of the weight percentage of Keratin Fiber in the compound on its tensile and flexural strength values according to ASTM D-63801 and ASTM D 790-03 respectively with a total of 15 samples per test. From the results obtained it was found that the tensile and flexural strength increases with respect to the increase in the weight percentage of Fiber, in tensile the maximum average value is 112.44 MPa with 20% by weight of Fiber and a minimum value of 45.02 MPa to 5% by weight Fiber, this represents 147.76% less than the maximum value. And the maximum flexural strength was 102.01 MPa and a minimum of 61.09 MPa, for compounds reinforced with 20% and 5% by weight Fiber respectively. KEYWORDS: Keratin, traction, flexion, composite
M Misra - One of the best experts on this subject based on the ideXlab platform.
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use of Keratin Fiber for separation of heavy metals from water
Journal of Chemical Technology & Biotechnology, 2004Co-Authors: Piyush Kar, M MisraAbstract:Nano-porous Keratin Fiber is effective in removing heavy metals from solutions. The biosorption of heavy metals from solutions is dependent upon the solution pH, the contact time, surface area and temperature. The intrinsic properties of the Keratin Fiber, ie stability over a wide range of pH, structural toughness and high surface area, are the positive factors. Alkaline ultrasonic treatment of the Keratin Fiber resulted in a multi-fold increase in metal uptake. Adsorption of heavy metals using both batch and column operations was conducted. Multiple elution and adsorption tests indicated that it is possible to reuse Keratin Fiber as a biosorbent for a number of cycles. 2004 Society of Chemical Industry
Piyush Kar - One of the best experts on this subject based on the ideXlab platform.
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use of Keratin Fiber for separation of heavy metals from water
Journal of Chemical Technology & Biotechnology, 2004Co-Authors: Piyush Kar, M MisraAbstract:Nano-porous Keratin Fiber is effective in removing heavy metals from solutions. The biosorption of heavy metals from solutions is dependent upon the solution pH, the contact time, surface area and temperature. The intrinsic properties of the Keratin Fiber, ie stability over a wide range of pH, structural toughness and high surface area, are the positive factors. Alkaline ultrasonic treatment of the Keratin Fiber resulted in a multi-fold increase in metal uptake. Adsorption of heavy metals using both batch and column operations was conducted. Multiple elution and adsorption tests indicated that it is possible to reuse Keratin Fiber as a biosorbent for a number of cycles. 2004 Society of Chemical Industry
Justin R. Barone - One of the best experts on this subject based on the ideXlab platform.
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effect of formic acid exposure on Keratin Fiber derived from poultry feather biomass
Bioresource Technology, 2006Co-Authors: Justin R. Barone, Walter F. SchmidtAbstract:Converting poultry feather biomass into useful products presents a new avenue of utilization of agricultural waste material. However, not much is understood about the poultry feather structure or methods to process it. In this study, formic acid vapor is systematically allowed to penetrate the feather Fiber structure, which is composed of Keratin. The diffusion kinetics show Fickian behavior during absorption. After very long times, i.e., greater than 10(3)h, the absorption experiments are stopped and the formic acid is allowed to desorb from the Keratin material. The desorption kinetics of formic acid out of the Keratin Fiber do not mirror the absorption kinetics, indicating a change in the Keratin microstructure. DSC and NMR spectroscopy analyses on the Keratin Fiber show a reduction in the area of the crystalline melting peak and solubilization of amino acids upon formic acid exposure. This indicates that the crystallinity is disrupted resulting in more amorphous fraction in the Keratin polymer.
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polyethylene Keratin Fiber composites with varying polyethylene crystallinity
Composites Part A-applied Science and Manufacturing, 2005Co-Authors: Justin R. BaroneAbstract:Short-Fiber reinforced composites are made from Keratin Fibers obtained from poultry feathers and polyethylenes of varying crystallinity. The chemical nature of the polymer and Fiber is kept constant and the molecular architecture of the polymer is varied. It is found that low crystallinity polyethylenes are reinforced by Keratin Fibers but high crystallinity polyethylenes are not. The Keratin Fibers inhibit crystallinity in low crystallinity polyethylenes but enhance crystallinity in high crystallinity polyethylenes. Microscopy shows increased adhesion between the Fibers and the polymer for the more amorphous polyethylenes. A model is presented that describes composite properties as a function of Fiber properties and matrix crystallinity.
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Polyethylene reinforced with Keratin Fibers obtained from chicken feathers
Composites Science and Technology, 2005Co-Authors: Justin R. Barone, Walter F. SchmidtAbstract:Polyethylene-based composites were prepared using Keratin Fibers obtained from chicken feathers. Fibers of similar diameter but varying aspect ratio were mixed into low-density polyethylene (LDPE) using a Brabender mixing head. From uniaxial tensile testing, an elastic modulus and yield stress increase of the composite over the virgin polymer was observed over a wide range of Fiber loading. Scanning electron microscopy revealed some interaction between the polymer and Keratin feather Fiber. In addition, the Keratin Fiber had a density lower than the LDPE used in this study resulting in composite materials of reduced density. The results obtained from mechanical testing are compared to theoretical predictions based on a simple composite material micromechanical model.
Walter F. Schmidt - One of the best experts on this subject based on the ideXlab platform.
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effect of formic acid exposure on Keratin Fiber derived from poultry feather biomass
Bioresource Technology, 2006Co-Authors: Justin R. Barone, Walter F. SchmidtAbstract:Converting poultry feather biomass into useful products presents a new avenue of utilization of agricultural waste material. However, not much is understood about the poultry feather structure or methods to process it. In this study, formic acid vapor is systematically allowed to penetrate the feather Fiber structure, which is composed of Keratin. The diffusion kinetics show Fickian behavior during absorption. After very long times, i.e., greater than 10(3)h, the absorption experiments are stopped and the formic acid is allowed to desorb from the Keratin material. The desorption kinetics of formic acid out of the Keratin Fiber do not mirror the absorption kinetics, indicating a change in the Keratin microstructure. DSC and NMR spectroscopy analyses on the Keratin Fiber show a reduction in the area of the crystalline melting peak and solubilization of amino acids upon formic acid exposure. This indicates that the crystallinity is disrupted resulting in more amorphous fraction in the Keratin polymer.
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Polyethylene reinforced with Keratin Fibers obtained from chicken feathers
Composites Science and Technology, 2005Co-Authors: Justin R. Barone, Walter F. SchmidtAbstract:Polyethylene-based composites were prepared using Keratin Fibers obtained from chicken feathers. Fibers of similar diameter but varying aspect ratio were mixed into low-density polyethylene (LDPE) using a Brabender mixing head. From uniaxial tensile testing, an elastic modulus and yield stress increase of the composite over the virgin polymer was observed over a wide range of Fiber loading. Scanning electron microscopy revealed some interaction between the polymer and Keratin feather Fiber. In addition, the Keratin Fiber had a density lower than the LDPE used in this study resulting in composite materials of reduced density. The results obtained from mechanical testing are compared to theoretical predictions based on a simple composite material micromechanical model.
